<template>
  <div class="wrapper">

    <!-- header部分 -->
    <header>
      <p>商家列表</p>
    </header>
    <!-- 商家列表部分 -->
    <ul class="business">
      <li v-for="item in businessArr" @click="toBusinessInfo(item.businessId)">
        <div class="business-img">
          <img :src="item.businessImg">
          <div class="business-img-quantity" v-show="item.quantity>0">
            {{item.quantity}}</div>
        </div>
        <div class="business-info">
          <h3>{{item.businessName}}</h3>
          <p>&#165;{{item.starPrice}}起送 | &#165;{{item.deliveryPrice}}配送</p>
          <p>{{item.businessExplain}}</p>
        </div>
      </li>
    </ul>
    <!-- 底部菜单部分 -->
    <Footer></Footer>
  </div>
</template>
<script setup>
import { ref, onMounted } from 'vue'
import { useRouter, useRoute } from 'vue-router'
import Footer from '@/views/Footer.vue'
import { businessApi } from '@/api/business'
import { cartApi } from '@/api/cart'

const router = useRouter()
const route = useRoute()
const orderTypeId = ref(route.query.orderTypeId)
const businessArr = ref([])
const user = ref(null)

const listCart = async () => {
  try {
    const response = await cartApi.listCart({
      userName: user.value.userName
    })
    
    if (response) {
      businessArr.value.forEach(business => {
        const businessCart = response.filter(item => item.businessId === business.businessId)
        business.quantity = businessCart.reduce((sum, item) => sum + item.quantity, 0)
      })
    }
  } catch (error) {
    console.error('获取购物车失败:', error)
  }
}

const toBusinessInfo = (businessId) => {
  router.push({
    path: '/businessInfo',
    query: { businessId }
  })
}

onMounted(async () => {
  user.value = JSON.parse(sessionStorage.getItem('user'))
  if (!user.value) {
    router.push('/login')
    return
  }

  try {
    const response = await businessApi.listBusinessByOrderTypeId(orderTypeId.value)
    if (response) {
      businessArr.value = response
      await listCart()
    }
  } catch (error) {
    console.error('获取商家列表失败:', error)
    if (error === 'No token' || (error.response?.status === 401)) {
      localStorage.removeItem('token')
      sessionStorage.removeItem('user')
      router.push('/login')
    }
  }
})
</script>
<style scoped>
/****************** 总容器 ******************/
.wrapper {
  width: 100%;
  height: 100%;
}
/****************** header部分 ******************/
.wrapper header {
  width: 100%;
  height: 12vw;
  background-color: #0097FF;
  color: #fff;
  font-size: 4.8vw;
  position: fixed;
  left: 0;
  top: 0;
  z-index: 1000;
  display: flex;
  justify-content: center;
  align-items: center;
}
/****************** 商家列表部分 ******************/
.wrapper .business {
  width: 100%;
  margin-top: 12vw;
  margin-bottom: 14vw;
}
.wrapper .business li {
  width: 100%;
  box-sizing: border-box;
  padding: 2.5vw;
  border-bottom: solid 1px #DDD;
  user-select: none;
  cursor: pointer;
  display: flex;
  align-items: center;
}
.wrapper .business li .business-img {
  /*这里设置为相当定位，成为business-img-quantity元素的父元素*/
  position: relative;
}
.wrapper .business li .business-img img {
  width: 20vw;
  height: 20vw;
}
.wrapper .business li .business-img .business-img-quantity {
  width: 5vw;
  height: 5vw;
  background-color: red;
  color: #fff;
  font-size: 3.6vw;
  border-radius: 2.5vw;
  display: flex;
  justify-content: center;
  align-items: center;
  /*设置成绝对定位，占文档流空间*/
  position: absolute;
  right: -1.5vw;
  top: -1.5vw;
}
.wrapper .business li .business-info {
  margin-left: 3vw;
}
.wrapper .business li .business-info h3 {
  font-size: 3.8vw;
  color: #555;
}
.wrapper .business li .business-info p {
  font-size: 3vw;
  color: #888;
  margin-top: 2vw;
}
</style>
